Immediately following the announcement, caution was urged by the jailbreak community with regard to the update. Minutes ago, MuscleNerd tweeted: "Unlockers please stay away from today's iOS 4.3.1! Just to be extra safe, so should future iPad2 jailbreakers (for now)." He subsequently added: "It's very unlikely they fixed the bug in comex's unreleased iPad2 jailbreak, but you never know. Better to wait for confirmation first."

For the time being, the update is not for the CDMA iPhone 4, only GSM iPhone 4. The CDMA iPhone 4 remains married to iOS 4.2.6. According to Apple, here's what iOS 4.3.1 gets you:

Fixes an occasional graphics glitch on iPod touch (4th generation)

Resolves bugs related to activating and connecting to some cellular networks